Calculate the dispersive power of a medium flint glass if `mu_v = 1.632` and `mu_R = 1.614`.

A beam of white light falls upon a 60^@ glass prism. Determine the angle of dispersion between violet and red lights if mu_v = 1.694, mu_R = 1.650

Calculate the velocity of electromagnetic waves in a medium having mu_r 2.5 and in_r = 1.6

Fill in the blank spaces with appropriate answers: If a convex lens of glass (mu = 1.5) is put inside carbon disulphide (mu = 1.65) then the nature of the lens changes from ____to ____.